Method and device for specific action on technological properties of separate areas of sheet material, pre-compacted material in form of non-woven fabric or material in form of fibrous mass

FIELD: metallurgy.

SUBSTANCE: invention relates to methods and devices for affecting processing characteristics of individual regions of sheet materials. Method includes fixing on work bench sheet material, or pre-compacted material or material in form of a fibrous mass. Placing at least one applicator on upper and/or lower sides of material. Applicator is moved from upper and/or lower side of material and improving medium is fed under pressure into separate areas of materials. Compression performed on pre-compacted material or material in form of a pulp sheet to form a predetermined thickness.

EFFECT: ensuring efficiency of action on separate areas of materials by providing a sealing system.

40 cl, 7 dwg

 



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to composition for superficial processing of surfaces in form of liquid agent for superficial processing, such as UF-solidified filler-containing vanish. Invention also relates to application of said composition for preliminary processing of surfaces and/or their edges of flat-shape elements. Agent for surface processing contains film-forming resin acryl-based composition and filler (3), with said filler including disperse material, selected from common salt, chalk (CaCO3), powder, glass particles or granules. Filler has size of particles smaller than 400 mcm. Agent for surface processing is used mainly for application on chamfers and edges of flat-shape elements from solid wood, laminated wood-based products, such as veneered panels and chipboard panels, panels of medium density and panels from mineral wool and plaster.

EFFECT: preliminary processing of surface with agent makes it possible to create smooth surface, which has good adhesion for the following decoration work, ie prolong service term of instruments, used for the following panel processing.

11 cl, 3 dwg

FIELD: technological processes.

SUBSTANCE: invention relates to the method of reduction of formaldehyde release in wood materials by application of nitrous compounds. The method includes (i) application of a mixture, containing at least polyamine and, if required, up to 20 wt % carbamide relative to the mixture weight, onto a wooden material; (ii) application of polyamine on or into a formed stock of a wood chipboard or a fibrous carpet; (iii) application of polyamine onto a coating substrate, which is to be used for surface treatment, and/or (iv) application of polyamine onto open areas; besides, polyamine has molecular weight of at least 500 g/mol, and at least 6 primary or secondary amino groups.

EFFECT: method makes it possible to reduce release of formaldehyde without reduction of mechanical properties and coverage of wood materials, type and strength of surface treatment, release of formaldehyde via open sections of a wood material with treated surface.

10 cl, 6 tbl, 13 ex

FIELD: process engineering.

SUBSTANCE: invention relates to woodwork, particularly, to production of oriented chip boards that feature higher swelling resistance and better look-down. Wood substrate edges are protected by applying two-component sealing composition on at least the surface of one edge. First component comprises coagulant while second component comprises aqueous composition of edge sealant. Invention covers also system for sealing of edges and substrate by coating with described composition.

EFFECT: better coating properties to improve water resistance.

31 cl, 5 dwg, 6 tbl, 10 ex

FIELD: woodworking industry.

SUBSTANCE: proposed method comprises impregnating wood blanks, drying, compaction and thermal treatment. Blanks impregnation is carried out with 30-40%-water solution of carbamide containing pre-condensate of carbamide-formaldehyde oligomer in amount of 10-12% of dry carbamide weight. Note here that hardener, i.e. "ПКП-52"-carbamide-formaldehyde resin is added to impregnating solution in amount of 21-25% of carbamide-formaldehyde oligomer weight. Before thermal treatment, timber is subjected to pulse magnetic field for 30 s with amplitude of 0.5 T, pulse repetition frequency of 50 Hz and duration of triangular pulses of 30 mcs. Thermal treatment is performed at 140-160°C.

EFFECT: reduction in volumetric swelling of modified timber in water.

1 dwg, 1 tbl, 2 ex

The invention relates to a method of deformation of blanks of paperboard from wood fibers (fibreboard), in particular, but not exclusively, to the field of processing so-called fibre cardboard medium density (DXP) in the procurement of a certain shape in the cavity of the mold in the press

The invention relates to a method of testing wood materials or products from them in the selection of their volatile substances and can be used to quantify the environmental safety of using wood materials or products from them in the premises, in particular in the application of finished and unfinished wood-based panels, furniture, contain and emit, for example, formaldehyde

The invention relates to the production equipped with a relief pattern sheet items
The invention relates to the production of wood-based panels, namely the technology of protection against access of moisture

FIELD: process engineering.

SUBSTANCE: invention relates to preheating of material laid over continuous circulating moulding mat belt in production of particle boards. For preheating of mat material on one or both sides microwave radiation is introduced therein. Material mat is compacted and hardened after feed into continuously operating extruder at definite pressure and temperature. For heating said mat microwaves in frequency band of 2400-2500 MHz are used. Said microwaves for every surface of said mat are generated in 20-300 microwave generators with 3-50 kW magnetrons each. Used heater is composed of continuous operation through-type furnace. 20-300 microwave generators with 3-50 kW magnetrons are arranged inside the furnace on every side to operate in 2400-2500 MHz frequency band.

EFFECT: higher efficiency of heating.

25 cl, 3 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to jointing the ends of wood sheet materials, particularly, to making mate grooves at said ends. Proposed method comprises, at least, driving the groove at end of said sheet material by rotary cutting tool. Note here that warped section of said end is leveled by clamping plate. This allows avoiding deep cutting and ensures equal size and shape grooves.

EFFECT: higher strength and reliability of joint.

4 cl, 25 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to production of wood-filled composite materials based on timber wastes and mineral binders. Proposed method comprises mixing wood filler with binder. Filler is treated in tight chamber in atmosphere of flue gases at 190-200°C for 50-60 minutes. Then, prior to mixing, filler is processed in plasma-forming gas flow in discharge chamber at high-frequency generator power of 200-600 W and vacuum of 100-130 Pa for 250-280 s. Air is used as said plasma-forming gas fed at flow rate of 0.08-0.12 g/s. After mixing of filler and binder, molding and heat treatment are performed.

EFFECT: higher strength.

1 tbl, 2 ex

FIELD: wood working industry.

SUBSTANCE: invention relates to wood working industry and may be used in production of multilayer particle boards. A line to manufacture particle boards comprises a belt conveyor, a machine to generate a chip carpet, a press and a spraying plant installed upstream the press with a valve to supply water. At the same time the line is equipped with an additional spraying plant with a valve installed upstream a shaping machine and a unit to measure warpage of boards installed downstream the press. Outlets of the unit to measure warpage are connected to control inlets of spraying plant valves. Due to development of moisture asymmetry of surfaces in the initial chip carpet, as a result of which mechanical stress occurs in a formed board during pressing that compensate for its warpage, which starts immediately after unloading of a board from the press, warpage in finished boards is eliminated.

EFFECT: invention may be used in production of multilayer wooden boards.

2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to recovery of solid household wastes into polymer-wood composite material to be used in production of components and parts of machines, equipment and construction structures. Proposed method comprises wastes mincing, mixing, thermal extrusion and activation. Activation is performed by magnetic-acoustic resonance effects in the frequency range of 5 to 15 kHz and radiation power of 15 to 20 mW.

EFFECT: higher efficiency and rate, improved mechanical properties.

4 cl, 2 tbl, 1 ex

Cooler for trays // 2335392

FIELD: heating.

SUBSTANCE: unit includes housing (1), conveyor (2) for tray (3) delivery, covering chambers (4, 5) of air and water cooling. In addition, air or water cooled chambers (4, 5) are provided with walls (6), installed inside chambers (4, 5) along conveyor. Air cooled chamber (4) walls (6) are perforated, while water-cooled chambers (5) are made of capillary porous material with steam discharge pipes (9).

EFFECT: improvement of output and reliability.

2 cl, 1 dwg

FIELD: construction.

SUBSTANCE: device for the steam treatment of a web moving relative to the device has steam outlet holes located on the steam head designed so that it can direct the steam pulse at an oblique angle relative to the web surface. Between the web surface and the steam outlet holes, a band screen is located, which moves synchronously with the web; the steam pulse can interact with the web through the band screen. The method involves manufacture of nonwoven fabric, its preliminary pressing, in particular, without binder curing, continuous pressing, during which the binder mainly cures, treatment with a steam pulse, which is directed at an oblique angle to the nonwoven fabric surface through the steam outlet holes on the rotatable steam head.

EFFECT: optimisation of continuous process during manufacture of plate-type structural element.

43 cl, 1 dwg

The invention relates to the production of chipboard-based particles of vegetable origin, in particular to press the composition and method of production of composite materials based on it

The invention relates to the production of chipboard-based particles of the wood plates differ in low emission of harmful and toxic substances

The invention relates to the production of wood pressing mass-based particles of vegetable origin, in particular to press composition, its preparation and method of production of composite materials based on it

FIELD: construction.

SUBSTANCE: device for the steam treatment of a web moving relative to the device has steam outlet holes located on the steam head designed so that it can direct the steam pulse at an oblique angle relative to the web surface. Between the web surface and the steam outlet holes, a band screen is located, which moves synchronously with the web; the steam pulse can interact with the web through the band screen. The method involves manufacture of nonwoven fabric, its preliminary pressing, in particular, without binder curing, continuous pressing, during which the binder mainly cures, treatment with a steam pulse, which is directed at an oblique angle to the nonwoven fabric surface through the steam outlet holes on the rotatable steam head.

EFFECT: optimisation of continuous process during manufacture of plate-type structural element.

43 cl, 1 dwg

Up!